Steel 30KHN2MA (30ХНМА)

Designation

Name The value
Designation GOST Cyrillic 30ХН2МА
Designation GOST Latin 30XH2MA
Transliteration 30HN2MA
By chemical elements 30CrН2Mo
Name The value
Designation GOST Cyrillic 30ХНМА
Designation GOST Latin 30XHMA
Transliteration 30HNMA
By chemical elements 30CrНMo

Description

30KHN2MA steel is used: for the manufacture of crankshafts, connecting rods, critical bolts, studs, special fasteners, discs, sprockets and other critical parts operating under severe loading conditions during normal, low and elevated temperatures.

Note

Structural steel high-quality romancelatina.

Standards

Name Code Standards
Sheets and strips В23 GOST 103-2006
Bars and shapes В32 GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Bars and shapes В22 GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings В03 GOST 8479-70
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Quenching in oil from 860 °C to + leave at 530 °C, air cooling
≤15 - 785 980 10 45 765 -
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
120-160 - 720 850 15 57 932 245
Quenching + tempering (forgings)
100-300 - 540 685 13 40 481 223-262
Quenching in oil from 850 °C + vacation (exposure 1 h)
- 200 1550 1750 10 587 125 -
Forging a cross section of 80 mm. Quenching + high holidays
- - 1100 1200 15 589 125 -
After quenching from 1150 °C and NTMO (700 °C, deformation 50%), cooling in oil + vacation at 200 °C (4 h exposure)
- - 1620 1860 - 25 343 500
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
15-40 - 900 1000 12 62 1472 300
Quenching in oil from 850 °C + vacation (exposure 1 h)
- 300 1450 1600 13 608 90 -
Forging a cross section of 80 mm. Quenching + high holidays
- - 950 1100 16 618 120 -
After quenching from 1150 °C and NTMO (500 °C, the deformation of 50%), cooling in oil +vacation at 200 °C (4 h exposure)
- - 1760 2050 - 20 353 540
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
160-200 - 600 800 16 55 785 240
Quenching in oil from 850 °C + vacation (exposure 1 h)
- 400 1300 1400 11 587 100 -
Forging a cross section of 80 mm. Quenching + high holidays
- - 800 950 20 736 100 -
After quenching from 1150 °C and NTMO (900 °C, deformation 50%), cooling in oil + leave 200 °C (4 h exposure)
- - 1550 1760 - 40 392 460
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
200-240 - 600 800 17 53 736 230
Quenching in oil from 850 °C + vacation (exposure 1 h)
- 500 1100 1200 15 638 125 -
Forging a cross section of 80 mm. Quenching + high holidays
- - 700 800 20 785 70 -
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
40-80 - 800 930 13 63 1373 275
Quenching in oil from 850 °C + vacation (exposure 1 h)
- 600 900 1000 19 687 200 -
Forging a cross section of 80 mm. Quenching + high holidays
- - 450 540 30 912 105 -
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
80-120 - 700 850 15 62 1177 250

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Physical characteristics

Temperature Е, HPa G, HPa r, kg/m3
0 204 80 7850
20 204 - -
100 201 79 -
200 194 76 -
300 186 72 -
400 182 69 -
500 171 67 -
600 159 61 -

A description of the physical symbols

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

Technological properties

Name The value
The temperature of forging Start - 1200 °C, the end - of 800 °C. slow Cooling. For large sections held anti-flake treatment.
Flock-sensitive sensitivity sensitive